Corona ring



FIG. 1 is a front elevation view of the corona ring, showing my new invention;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a perspective view thereof.

The broken line portion of the figure drawings is included to show unclaimed subject matter only and forms no part of the claimed design. 

CLAIM The ornamental design for a corona ring, as shown and described. 